Investigating the relationship between repetition in reserve and fatigue in trained men

Introduction and Monitoring athletes is important for the management of fatigue and performance. This study was to investigate the possibility of using repetition in reserve for monitoring and controlling fatigue during resistance training.
11 male subjects (22.82±1.1422 years) with at least one year of training experience participated voluntarily in two separate test sessions with a time interval of 72 hours. In the first session, the Participant asked for 1 repetition maximum test (1RM). In the next session, they conducted the maximum number of repetitions (MNR), also the velocity of each repetition is recorded at the speed of 240 frames per second (240 fps). Finally, the correlation between velocity loss and repetition in reserve was evaluated using the Pearson correlation test with a significance level (P<0.05). However, the range of changes in repetition in reserve at 10% of the velocity loss was checked to examine the possibility of practical use.
There was a strong correlation between velocity loss and repetition in reserve (r=0.97), the range of repetition in reserve equal to 10% of velocity loss was equal to 4, the maximum repetition in reserve was 7 and the minimum was 3.
Discussion and Despite the strong correlation between velocity loss and repetition in reserve, it is not possible to use repetition in reserve for control and monitoring of fatigue due to the wide range of reserve repetition along with a fixed amount of velocity loss (10%).